668867843 has 8 divisors (see below), whose sum is σ = 765118560. Its totient is φ = 572791680.

The previous prime is 668867821. The next prime is 668867851. The reversal of 668867843 is 348768866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 668867843 - 2⁶ = 668867779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668867813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35318 + ... + 50843.

It is an arithmetic number, because the mean of its divisors is an integer number (95639820).

Almost surely, 2^668867843 is an apocalyptic number.

668867843 is a deficient number, since it is larger than the sum of its proper divisors (96250717).

668867843 is a wasteful number, since it uses less digits than its factorization.

668867843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87277.

The product of its digits is 9289728, while the sum is 56.

The square root of 668867843 is about 25862.4794441678. The cubic root of 668867843 is about 874.5408608321.

The spelling of 668867843 in words is "six hundred sixty-eight million, eight hundred sixty-seven thousand, eight hundred forty-three".